DEBIAN-CVE-2019-16785

Advisory lineage Upstream: 1 Downstream: 1
Upstream
CVE-2019-16785
Downstream
DLA-3000-1
Published: 20 Dec 2019, 23:15
Last modified:28 Apr 2026, 20:20

Vulnerability Summary

Overall Risk (default)
medium
30/100
CVSS Score
7.5 HIGH
3.1 (osv_debian)
EPSS Score
No data
KEV
Not listed
Ransomware
No reports
Public exploits
None found
Dark Web
Not detected

Timeline

20 Dec 2019, 23:15
Published
Vulnerability first disclosed
28 Apr 2026, 20:20
Last Modified
Vulnerability information updated

Description

Waitress through version 1.3.1 implemented a "MAY" part of the RFC7230 which states: "Although the line terminator for the start-line and header fields is the sequence CRLF, a recipient MAY recognize a single LF as a line terminator and ignore any preceding CR." Unfortunately if a front-end server does not parse header fields with an LF the same way as it does those with a CRLF it can lead to the front-end and the back-end server parsing the same HTTP message in two different ways. This can lead to a potential for HTTP request smuggling/splitting whereby Waitress may see two requests while the front-end server only sees a single HTTP message. This issue is fixed in Waitress 1.4.0.

CVSS Metrics

  • v3.1•HIGH•Score: 7.5CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N

Affected Systems

  • debian•waitress

    < 1.4.1-1 | < 1.4.1-1 | < 1.4.1-1 | < 1.4.1-1

References (1)